Michael m



` intcd States?,

@Hiwit Chillin.

Lezers Patent No. 96,281, ma october 26, 1869.l

DEPROYVBD SELF-FEEDING' BOILING' AN D EVAPORATINGQAPPRATUS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, MICHAEL M. SMITH, of St. Louis, in the county of St. Louis, and State of Missouri, have made certain new and useful Improvements in Self-Feeding Boiling-Apparatus; and I do hereby declare the following to be a full and true description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

This invention relates to the manner of heating the iiuid in a tank or boiler, by means of heat applied to a pipe, which, at its ends, connects with the interior of said tank or boiler; and said invention relates more especially to the arrangement of a feeder fluid-supply pipe within the said pipe, for heating, so that the supply of fluid shall reach the part which is subject to greatest heat, and, by its expansion, shall rise to cause a feeding or supply-current toward the tank or boiler.

To enable those herein skilled to make and use my said improved invention, I will now more fully describe the same, referring herein to the accompanying,

Figure 1, as a plan and part section; to Figure 2, as an elevation, representing my said apparatus in one of its more usual formsr of application.

Inse a boiler or tank, A, such as may be applied for rendering lard, boiling soap or sorghum, or similar solutions, the same being of wood'or iron.

From near the bottom of said'boilel-I arrange a pipe,

B, (usually of wrought-hom) which passes forward to an elbow-joint with the heater-piece- B', and passes by a second elbow-joint, back, on an upward incline, to a discharge in the tank or boiler, the discharge-end b being, however, in the diametrical direction ofthe outlet-pipe B, as plainly shown in iig. l.

Heat will be applied to the piece B from a proper furnace, so as to cause, by the expansion of fluid in the pipe, and its consequent tendency to rise, a circlilatiou, by which all the fluid in the boiler Awill be readily brought to boiling.

As the fluid in the boiler, by this process, evaporates, it becomes useful to add to the said fluid a fresh supply, asin boiling down soap, 0r sorghum, or rendering lard, or other fatty oils. n

This feed of fresh fluid I achieve by a feed-pipe, C, which connects at its outer end with a supply-tank, and which lhas a `proper valve, c, for regulating the feed-flow. Said feedpipe C is of smaller' diameter than the' heater-pipe B', and passes into the latter, being arranged with a suitable joint.

vby the pipe G, thus creating the required feed-flow.

Said feed-How is then regulated in accordance with the evaporation at the boiler A, or in accordance with such other necessities of thel case as may occur, the iegl1latio11`being effected by the valve or cock c, as aforesaid.

Screens will be used at the inflow and outflow-openings of the pipe B b, to prevent clogging by sediment or other matter, or the screens may placed, as a kind of false bottom, in the boiler A, immediately over said pipe-ends. I l

By causing the feed-dow to enter at the point of heatapplication, there is less danger 'of-overheating the heater-pipe B', or of incrustation of charred or other dried sedimentary matter in said pipe, thus not only preventing damage to the heater-pipe, but also insuring economical application of fuel inthe heatingprocess. 1

In my said process, the fluid in the boiler- A .is stirred up effectually by the currents of fluid, caused by the outpassing and incoming ilow from the pipe B, and there is thus no danger from overheat-ing of the boiler, from overflow of fluid therein, or other serious casualty usually arising from overheating when heat is applied directly to the boiler.

Again, as the feed-flow is constant, and may be perfectly regulated, the product of the boiling or render-v ing-process'is uniform in quality and strength.

Having thus fully described my invention,

What I claim, is-

1. The heater-pipe B', combined with the feed-pipe O, and its stop-cock or valve o, operating substantially as setforth. y

2. The boiler A, pipe B, heater-pipe B', feed-pipe O, when operating substantially as andfor the purpose set forth.

M. M. SMITH.

Witnesses:

` Gao. P. HERTHEL', Jr.

WILLIAM W. HERTHEL. 

